implemented adding of new options

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/poll/Edit.svelte

@@ -28,6 +28,9 @@
 		let res = await post(url,new_option);
 		if (res.ok){
 			yikes();
+			const json = await res.json();
+			console.log(json);
+			poll.options = json.options;
 		} else error(res);
 	}